/*
 * This file is part of aion-engine <aion-engine.com>
 *
 * aion-engine is private software: you can redistribute it and or modify
 * it under the terms of the GNU Lesser Public License as published by
 * the Private Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * aion-engine is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser Public License for more details.
 *
 * You should have received a copy of the GNU Lesser Public License
 * along with aion-engine.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.aionengine.gameserver.controllers.movement;

import com.aionengine.gameserver.model.gameobjects.Creature;
import javolution.util.FastMap;


/**
 * @author Rolandas
 */
public class SeenCreatureList {
    private FastMap<Integer, Creature> seenCreatures;

    public boolean add(Creature creature) {
        if (seenCreatures == null)
            seenCreatures = FastMap.newInstance();
        return seenCreatures.putIfAbsent(creature.getObjectId(), creature) == null;
    }

    public boolean remove(Creature creature) {
        if (seenCreatures == null)
            return false;
        return seenCreatures.remove(creature.getObjectId()) != null;
    }

    public void clear() {
        if (seenCreatures != null)
            seenCreatures.clear();
    }

    public boolean contains(Creature creature) {
        if (seenCreatures == null)
            return false;
        return seenCreatures.containsKey(creature.getObjectId());
    }
}
